Fix 'GC_old_bus_handler defined but not used' compiler warning

* os_dep.c [!DARWIN && !MSWIN32 && !MSWINCE] (GC_old_bus_handler):
Define variable only if FREEBSD or HPUX, or HURD, or LINUX.
* os_dep.c [!DARWIN && !MSWIN32 && !MSWINCE && (HPUX || HURD
|| FREEBSD)] (GC_dirty_init): Do not set GC_old_bus_handler_used_si
to FALSE (because it is already initialized to FALSE).

diff --git a/os_dep.c b/os_dep.c
index 27afee1cbea3469370842f7c16e6ad8857a0259e..0e6226d28f1c285defc36c81c211cd499bd9733e 100644 (file)
--- a/os_dep.c
+++ b/os_dep.c
@@ -3073,11 +3073,13 @@ GC_API GC_push_other_roots_proc GC_CALL GC_get_push_other_roots(void)
 #ifndef DARWIN
   STATIC SIG_HNDLR_PTR GC_old_segv_handler = 0;
                         /* Also old MSWIN32 ACCESS_VIOLATION filter */
-# if !defined(MSWIN32) && !defined(MSWINCE)
+# if defined(FREEBSD) || defined(HPUX) || defined(HURD) || defined(LINUX)
     STATIC SIG_HNDLR_PTR GC_old_bus_handler = 0;
-#   if defined(FREEBSD) || defined(HURD) || defined(HPUX)
+#   ifndef LINUX
       STATIC GC_bool GC_old_bus_handler_used_si = FALSE;
 #   endif
+# endif
+# if !defined(MSWIN32) && !defined(MSWINCE)
     STATIC GC_bool GC_old_segv_handler_used_si = FALSE;
 # endif /* !MSWIN32 */
 #endif /* !DARWIN */
@@ -3334,9 +3336,6 @@ GC_API GC_push_other_roots_proc GC_CALL GC_get_push_other_roots(void)
 #       endif
       } else {
         GC_old_bus_handler = (SIG_HNDLR_PTR)(signed_word)oldact.sa_handler;
-#       if !defined(LINUX)
-          GC_old_bus_handler_used_si = FALSE;
-#       endif
       }
       if (GC_old_bus_handler == (SIG_HNDLR_PTR)(signed_word)SIG_IGN) {
         WARN("Previously ignored bus error!?\n", 0);